Pressing machine



March 31, 1936. E. DAVIS PRESSING MACHINE Filed May 12, 1928 5 Sheets-Sheet l jkgfk. g

INENTOR. fiQfwf/M A TTORNEY6'.

E. DAVIS PRESSING' MACHINE Filed Ma 12, 1928 3 Sheets-Sheet 2 v INVENTOR. W/f

WW/fi /M A-1ITORNEY5 March 31, 1936. E. DAVIS PRESSING MACHINE 3 Sheets-Sheet 5 Filed May 12, 1.928

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I IIYVENTOR.

ATTORNEYS.

Patented Mar. 31, 1936 UNITED STATES PATENT OFFICE 7 2,035,792 PRESSING MACHINE Application May 12, 1928, Serial No. 277,109

9 Claims.

This invention relates to pressing machines, particularly garment or cloth pressing machines Where steam is blown into the garment or cloth to moisten it preliminary to a pressing and drying v operation, and air is blown into the goods or garment to condense the steam to form moisture and after the pressing operation to cool the garment; and it consists in a particularly simple and efiicient means for actuating and controlling the actuation of the movable element of the pressing machine and the flow of air and steam into the garment or goods being operated upon.

The invention consists in the novel features, and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation, partly broken away, of-this pressing machine.

Figure 2 is a sectional view, partly diagrammatic, of the actuating and control mechanism for the movable pressing element.

Figure 3 is a fragmentary elevation, partly in section, of the lower pressing element illustrating the means for controlling the flow of two fluids as steam and air to the work between the pressing elements.

Figure 4 is a diagrammatic fragmentary plan view illustrating the relative position of the manuals of the machine.

Figure 5 is a sectional view through the head of the machine.

The machine, here illustrated, is of the conventional type including cooperating pressing elements, one of which is movable toward and from the other, the movable element being here shown as a head I movable toward and from the buck 2, the buck being mounted on a bracket or goose neck 3, which is mounted on a bench or table 4 supported by the usual frame 5.

The head I is usually carried by a yoke lever 6 pivoted between its ends at 'I to a standard 8 rising from the frame.

As seen in Figure 5, the head I is formed with an internal chamber 9 for receiving a heating medium as steam and also with a lengthwise channel I!) and with a by-pass II connecting the steam chamber 9 and the channel I0, this passage being controlled by a valve I2 operated by a handle I3.

The side I4 of the channel on the pressing face of the head I is formed with perforations or jet openings for permitting the outlet of steam when the valve I2 is opened and also the pressing face of the head is covered by a layer of wire mesh I5, this being normally spaced apart from the pressing face in order to permit the steam to be distributed over the face of the head. The wire mesh also performs other functions such as preventing the formation of a shiny finish on the goods, and also because of its thickness permits the moisture to evaporate out of the garment when under pressure.

This invention comprises motor means, connections between the motor means and the movable element or head I and operator-operated means for controlling the operation of the motor means to actuate the head into a position close to the buck or other element and preferably into light pressure coaction with the other element or buck, and also additional operator-operated means for controlling the motor means to actuate the head into heavy pressure coaction with the buck, the operator-operated means being operable successively to effect a two step operation of the machine. By the two-step operation, the motor means is operated first to preliminarily bring the movable element toward and preferably into light pressure coaction with the buck and second to bring the movable element into full pressure position. The two operator-operated means also are operable simultaneously to effect a one step operation to bring the head into full pressure position from wide open position. One of the objects of the two step operation is to perform a moistening operation while under light pressure before heavy pressure is applied to shape and dry the goods or garment.

The motor means here illustrated comprises two motor units, both of which coact to apply heavy pressure and one of which acts for the most part to preliminarily close the press. The motor means here shown comprises two cylinders I6, I7 and pistons I8, I9 movable in their respective cylinder. A separate motion transmitting means is provided between each of the pistons and the head I or the yoke lever 6, whereby nearly full throw of the piston I8 brings the head I nearly down on the buck 2 or under light pressure coaction with the buck 2 and nearly full throw of the piston I9 through lever mechanism effects a final heavy pressure, full movement of both pistons being required to bring about heavy pressure.

In the illustrated embodiment, the cylinder I6 is pivoted at its lower end 20 to the frame 5 and the piston moves upwardly therein under the pressure of a motive fluid, as air, and its rod 2| piston I9 takes place. 30

is pivoted at 22 to the rear arm of the yoke lever 5. The cylinder I5 is provided with a packing I5 in the nature of a valve packing, against which the piston I8 seats when it reaches the end of its out stroke, this packing preventing the leakage of air along the cylinder walls.

The motion transmitting mechanism between the piston I9 and the head I or the rear arm of the yoke lever 5 includes the piston rod 33, a combined lever and pull link 24 to which the lower end of the piston rod 23 is pivoted at 25, toggle links 25 and 21 pivoted together at 28 and pivoted respectively at 25 to the frame and at 30 to the rear end of the yoke lever, the link 24 being pivoted at 3| to one of the toggle links. The link 24 fulcrums with a sliding action on the frame at 32. The link 25 is guided in its movement by a cam slot 33 formed in a bracket 35 fixed to the frame and having an upper portion inclined slightly out of the horizontal and a rearward and downward portion inclined out of the vertical. The link 25 has a follower movable in the slot.

While the head is being closed principally under the action of the piston IS in the cylinder I6, the follower is traveling along the upper portion of the slot 33 which is inclined out of the horizontal and hence very little movement of the While heavy pressure is being applied primarily by piston IS in the cylinder II, the follower is moving in the lower portion of the slot which is inclined out of the vertical. The incline of the upper portion of the slot out of the horizontal is such that it does not prevent the actuation of the piston I9 when the motive fluid is permitted to enter simultaneously into both cylinders or into the cylinder I'I before it enters the cylinder I5. The degree of incline of the upper portion of the slot 33 is a matter of selection and where, as particularly described herein, it is desired that the high power motor Il shall participate in the initial closing movement of the head I by depressing the buttons 5| and 53, the incline must be at least sufficient to obtain this result. The effect of the motor I5 in impelling the cam roller to the right as shown in Figure'l, has some bearing on the amount of incline required. The pistons are single acting. ,The press is opened when the motive fiui-d or air is permitted to' exhaust from the cylinders by countersprings 35, 35. The cylind'er II ispivoted at3I at its upper end to the frame and the piston moves downwardly therein on its power'stroke.

The operator-operated means for controlling the flow of 'motive fluid, as air, to the cylinder I5 as'here shown comprises a pedal 38 pivoted at 39 to the base ofthe frame and connected to a rod 45, which thro-ugh'a spring' ll acts on the lever 42 which effects the closing of a normally open exhaust valve 43 and the opening of a norinally closed intake valve 55 in a valve casing 45, the valves being connected so that they act as aunit by a stem 55. The intake valve 44 is spring pressed so that it is normally held in its closed position and the exhaust valve is normally held in its open position.

The valve casing 45is connected by a pipe 41 to aport 48 in the head of the cylinder I15, this port opening into the cylinder I5. The intake end of the valve casing 55 is connected by a pipe Alto a feed pipe 55 which is connected to a suitabl e source of compressed air.

Obviously upon depression of the'pedal 38, the exhaust'valve'43 will be closed and the intake valve 44 opened, permitting air to pass through the pipe Al into the cylinder I5. When the valves are in their normal position or are returned to their normal position, the air is free to exhaust from the cylinder I5 back through the pipe 41, valve casing 55 and out through an exhaust passage 43 The flow of air to the cylinder I1 is controlled by a manual, as a push button 5| which acts on a lever 52 which in turn acts on a lever 53 coacting with the stem 54 of a normally open exhaust valve 55 which is connected by a stem 55 to a normally closed spring pressed intake valve 51, the valves being located in the casing 58. The casing 58 is connected by a pipe 59 to a coupling 55 communicating with a port 5I in the head of the cylinder II, this port opening into the upper end of the cylinder IT. The intake end of the valve casing 58 is connected by a pipe 52 to the feed pipe 55. 7

Obviously, upon depression of the. push button 5I air will pass from the feed pip-e 53 through a valve casing 58 and pipe 53 into the cylinder II to actuate the piston therein. When the valves are returned to their normal position, the air is free to exhaust out of the cylinder I? back through pipe 59, valve casing 55 and exhaust port 55 controlled by the exhaust valve 55.

Preferably, both hands of the operator are occupied when the press is being closed under final heavy pressure in order to prevent injury to the operator and therefore two manuals are provided requiring that both hands of the operator be so occupied. These push buttons are operable independently of the operator actuated control member 43, 45.

The other manual consists of a push button 53 acting on the lever 54 which in turn acts on a lever 55 which coacts with the stem 55 of a normally open exhaust valve 5! in the valve casing 58, this valve casing being connected by a pipe 59 to the coupling so that if the push button 53 is not depressed when the push button 5! is depressed, the. air will exhaust out through the valve casing 58 instead of passing into the cylinder II.

Means is provided for holding the valves, operated by manuals 5|, 53, in their operated position. The means here shown are pressure operated and include diaphragm chambers I and II having diaphragrns I2 and I3 therein coacting with sliding stems M and I which act upon the levers 53 and 55 respectively.

The pressure sides of the diaphragm chambers Ill and II are connected by pipes I5 and TI to a r pipe I8 which communicates with a casing I9 having a port 85 opening into the cylinder I1 and arranged to be uncovered by the piston when the piston is well on its out stroke, so that the back pressure from the cylinder passes back through the pipes I8, 15 to the diaphragm cham bers I0 and II and acts on the diap-hragms therein to hold the valves in the casings 58 and58 in their operated position.

The pressure is released in the diaphragm chambers to permit these valves to move to their normal position, in which theexhaust valves are open, by a normally closed spring pressed exhaust valve 8| in a valve casing 82 which is connected-by a pipe 83 to the pipe I5. This release valve 8i is operated by a lever 54. Obviously upon the operation of the lever 84, the exhaust valve 8! will be opened permitting the air to exhaust from the diaphragm chambers and hence permitting the exhaust valve 55 to open and the intake valve 51 to close, so that air can exhaust from the cylinder I1, through the pipes 59, 69, valve casings 58 and 68 and out through exhaust passages 55 and 61*.

Thus when the head is under final pressure, the operation of the trip lever 84 will release the head of the heavy pressure although the head will be held under light pressure by the piston I8 in the cylinder I6, if the operator continues to hold his foot on the pedal 38.

To look the press closed without the necessity of holding down the pedal 88, means is provided for locking the intake valve 44 open and the exhaust valve 43 closed, these being the valves operated by the pedal 38. This holding means includes a diaphragm chamber 85 having a diaphragm 86 therein acting on a sliding stem 87 which in turn acts on the lever 42. The pressure side of this diaphragm chamber 85 is connected by pipes 88 and 89, valve casing 98' and pipe 9| to the pipe 49 which is connected to the feed pipe 58.

The flow of air through the valve casing 98 is controlled by a normally closed spring pressed intake valve 92 therein, a normally open exhaust valve 93 connected by a stem 94 with the valve 92, and these valves are operated by a manual or lever 95 coacting with the stem 95 of the exhaust valve 93. Upon depression of the lever 95 the exhaust valve 93 will be closed and the intake valve 92 opened permitting air to flow from the main line through the valve casing 98, pipes 89 and 88 to the diaphragm chamber 85. This mechanism provides means which are operable at will for locking the first control member 43, 45 in its operated position.

The valves 92 and 93 are locked in their operated position by a diaphragm chamber 91 having a diaphragm 98 therein coacting with a sliding stem 99 which acts on the lever 95. The pressure side of the diaphragm chamber is connected by duct I00 to the interior of the casing so that when the lever is depressed and hence the exhaust valve 93 closed and the intake 92 opened, the air will enter the diaphragm chamber and hold the lever 95 in its operated position.

To open the press or to release either the pressure in the cylinder I8 or release the pressure simultaneously in both cylinders I8 and I1, additional means is provided for releasing the pressure in the diaphragm chambers 18 and II and also in the chambers 85 and 9?. This means comprises normally closed exhaust valves I 8| and I82 located in chambers I83 and I08 of a valve casing I05. The chamber I03 is connected by a pipe I06 to any one of the pipes I6, '17 or I8, it being here shown as connected to the pipe 11; and the chamber I04 is connected by a pipe I01 to the pipes 88 and 89.

The valve I0'I is operated by a lever I08 and the valve I02 is operated by a lever I89 which thrusts at IIO against the lever I 08 so that the operation of the lever I89 also actuates the lever I08.

To release the pressure in the diaphragm chambers I8 and II and hence release the pressure in the cylinder I1, the lever I08 may be operated, and to release the pressure in all the diaphragm chambers to efiect a complete opening of the press, the lever I09 is operated. The lever I09 contacts with the lever I88 at II8 so that operation of the lever I09 will also operate the lever I08 and open both of the exhaust valves IN and I02.

The lever I08 performs the same function as the lever 84. The levers I08 and I09 are usually a remote control. An operator usually operates two machines designated generally A and B. The remote control for machine A is located on machine B and the remote control for machine B is located on machine A so that an operator after closing the press, as machine A, can entirely open up or partly open up machine B from machine A so that it will be open by the time he reaches machine B.

In order that both cylinders I6 and I1 and the pistons therein may be utilized to produce final heavy pressure when the push buttons SI, 63 are operated to close the press with a one step operation, the cylinders are connected together so that they act as a single motor, by a pipe I'I connecting the intake end of the cylinder I! to the intake end of the cylinder I 6 or to the pipe 41. This pipe I'l has a spring pressed check valve I 7 therein arranged to prevent the flow of air into the cylinder I! from the pipe 4'! or the cylinder I i but permits the flow of air from the cylinder I6 to the pipe 4'! when sufficient pressure is developed in the cylinder I? to overcome the spring of the check valve. When the air passes through the pipe I "l from the cylinder I I, it will pass out through the exhaust valve 83 unless this valve 83 is closed and the intake valve 44 opened by operating the pedal 38 or the manual lever 95.

The incline of the upper portion of the cam slot 33 is such that when the push buttons SI, 63 are operated, the piston I9 can travel far enough to close the head preliminarily or lightly down on the buck with little or no pressure, the follower on the combined push rod and lever 24 moving along the upper portion of the cam slot 38 to an angle of the cam slot. At this point in the operation, the check valve I T opens, as it requires less pressure to open the check valve than to actuate the piston I9 to apply heavy pressure, the check valve being opened, the air will leak out from the cylinder I! through the pipe H pipe 81, valve casing 85 and past the open exhaust valve 83 unless the exhaust valve 43 is closed and the intake valve 44 opened by the depression of the pedal 88 or the manual lever 95. Hence both cylinders operate to apply final heavy pressure.

During the closing of the press, either by first depressing the pedal 38 or the push buttons 5|, 83, the piston I9 travels nearly half the length of the cylinder I7 before the head comes down onto the buck.

Steam and comparatively cold air are blown into the garment to generate moisture in the garment which is distributed equally through the garment. Thereafter the garment is dried by heat and pressure, and thereafter, if desired, relatively cold air may be blown into the garment to cool it.

The means for blowing air and steam will now be described, which means is associated with the buck 2 although the head also has means controlled by the lever I8 for blowing steam into the garment form the top thereof.

As seen in Figure 3, the buck 2 is formed hollow with a chamber III for receiving steam and with a lengthwise channel II2 having perforations or jet openings II 3 opening through the pressing face of the buck. The buck is overlaid with a spring padding H4 and layers of padding I I 5 and a wrapper I I8. The arrangement of the chamber III and channel H2 is substantially like chamber 9 and channel I0 of the head I.

The buck is also formed with an inlet duct II1 for the steam. and an inlet duct M8 for the air and these ducts register respectively with passages H9 and I26 formed in the goose neck or bracket 3. The buck is also formed with an outlet duct I2! leading from its steam chamber III which registers with a passage I22. The passages H9 and I22 communicate with the interior of a valve casing I23 which controls the flow of steam from chamber III through the passages I2I, I22, valve casing I23, passages H9 and H1 to the channel II2. The air passage I20 communicates with a pipe I24 which is connected through valve controlled means to the feed pipe 50.

The steam valve I23 is preferably operated by compressed air. The means for operating the steam valve comprises a diaphragm chamber I25 having a pair of spaced apart diaphragms I26 and I21 therein. The diaphragm I26 acts on the stem I28 of the valve. The space between the diaphragms is connected to a pipe I29 which is also connected to a valve casing I30 having a normally open exhaust valve I3I therein and a normally closed spring pressed intake valve I32, these valves being connected by a stem I33 whereby they act as a unit.

The intake end of the valve casing I36 is connected by a pipe I32 to a pipe I35 which is connected to a branch I35 of the main feed line 56 for the air.

The valves I3! and I32 are operated by a pedal I31 pivoted at I36 to the base of the machine and connected by a rod I39 to a lever I46 which coacts with the stem I iI of the exhaust valve. The motion of the link I39 is yieldingly transmitted to the lever I40 through a spring I42.

The valve I3I controls an exhaust passage I3I Upon depression of the pedal I31, the exhaust valve I3I will be closed and the intake valve I32 opened, so that air passes through the valve casing I36 and pipe I29 into the space between the diaphragms I26, I22 and actuates the steam valve I23 to open it to permit steam to pass into the channel H2, through the jet openings II3, through the padding and wrapper and into the goods or work on the buck.

The pedal I31 is returned to its normal position by a spring I43. When the pedal I3? is released, the air is free to exhaust from the space between the diaphragm chambers I26 and I21 back through the pipe I29, valve casing I36 out through the exhaust passage I3I and thus permit the steam valve I23 to close.

The steam valve 23 may be manually operated as by a manual w l coacting with the stem I of an exhaust valve I45 in a valve casing I 41, the exhaust valve being connected by a stem I43 to a normally closed spring pressed intake valve I555. The exhaust valve controls an exhaust passage E it The intake end of the casing is connected by a pipe I to the air pipe I35.

When the lever I46 is moved downwardly, Figure 3, or to the left, Figure 4, the exhaust valve I46 will be closed, the intake valve M9 opened, so that air passes hrough the valve casing I41 and pipe I5I to the diaphragm chamber 125 below the diaphragm I21, thus actuating the stem I28 of the steam valve to open it.

The blowing of air is also controiled by the lever I44, this lever having a movement from neutral in opposite directions so that air and steam can be alternately blown by moving the lever in opposite directions, or the air and steam may be blown at the same time by depressing the pedal 31 and moving the lever I64 upwardly, Figure 3, or to the left, Figure 4.

The lever I44 also coacts with a stem I52 and a normally open exhaust valve I53 coupled by a stem I54 to a normally closed spring pressed intake valve I55, these valves being located in a casing I56,

The intake end of the valve casing I56 is connected to the air pipe I36. The exhaust valve I53 does not function as an exhaust valve but its primary function is to act as a packing when the intake valve I55 is open. This construction avoids the use of a packing that will become leaky and also permits the use of one kind of valve throughout the machine. In other words, a valve arrangement as I53 is used instead of a packing that would become loose.

Upon movement of the lever I 44 upwardly, Figure 3, or to the left, Figure 4, air will pass through the valve casing I56, pipe I24, passages I26 and H8 into the channel H2 of the buck and out through the perforations H3 and the padding and wrapper of the buck and carry the steam therefrom into the garment and also as:

the air is comparatively cold, will condense the steam in the garment and moisten the garment. The air will also condense the steam in the garment regardless of whether the garment is steamed from the head or from the buck.

In the operation of the complete machine, the operator after arranging the work on the buck depresses the pedal 38, permitting air to enter cylinder I6 and actuate the piston I8 therein thus bringing the head I down close to and preferably under light pressure on the buck. He then operates the lever I44 to the right, Figure 4 or downwardly, Figure 3, to operate the steam valve to permit steam to be blown into the garment. He may also operate the lever I3 to permit steam to be blown into the garment from the head I. the left, Figure 4 or downwardly Figure 3, thus discontinuing the flow of steam and permitting the cold air to blow through the padding and the garment to condense the steam therein and moisten the garment and to blow the garment.

The push buttons 5i, 53 are then depressed to permit air to enter the cylinder I1 and actuate the piston I6 therein to the end of its power stroke. The movement of the head by the piston I6 moves the piston I9 more or less, depending on the inclination and form of the upper portion of the cam slot 33, during the closing of the press and during such movement the follower is traveling along the upper portion of the cam slot 33 which portion is inclined slightly outv of horizontal. However, the piston I9 moves through the greater part of its stroke when applying heavy "pressure through the toggle links 26, 21 and link 24. The machine may then be locked under pressure when the garment is drying by depressing the lever 95 thus permitting air to enter the diaphragm chambers 85 and 91.

The machine may be completely closed in a one step operation from wide open position by depressing the pedal 38 and push buttons 5|, 63 simultaneously.

The machine is completely released so as to open wide by operating the lever I69 of the remote control mechanism or it may be partly released to remain under light pressure by either operating the'lever I68 of the remote control mechanism or the lever 84.

He then operates the lever I44, to

Steam may be blown regardless of whether the machine is open or under light pressure or under heavy pressure by depressing the pedal I31 or steam or air may also be blown at any time by operating the lever hi4; both steam and air can be blown simultaneously by depressing the pedal 13! and operating the lever Hi4 downwardly, Figure 3, or to the right, Figure 4.

What I claim is:

1. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, two cylinders and pistons therein, and motion transmitting means individual to each piston between the pistons and the movable element, operator-operated means individual to each cylinder for controlling the flow of motive fluid to each cylinder independently, and meansconnecting the cylinders and permitting fluid flow from the second cylinder to the first cylinder only, whereby upon operation of the pistons successively the press is closed with a two-step operation and upon the operation of the second piston the press is closed with a one-step operation.

2. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, two cylinders and pistons therein, motion transmitting means individual to each piston between the pistons and the movable elernent, operator-operated valve means individual to each cylinder for controlling the flow of motive fluid to each cylinder independently of the other cylinder, means connecting the cylinders and permitting fluid flow from the second cylinder to the first cylinder only whereby upon the operation of the pistons successively, the press is closed with a two-step operation and upon the operation of the second piston, the press is closed by a one-step operation, the operator-operated valve means for the second cylinder including two manuals and means whereby both manuals must be operated to effect the flow of motive fluid to the second cylinder.

3. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, two cylinders and pistons therein, and motion transmitting means individual to each piston between the pistons and the movable element, operator-operated means individual to each cylinder for controlling the flow of motive fluid to each cylinder independently, means connecting the cylinders and permitting fluid flow from the second cylinder to the first cylinder only whereby upon the operation of the pistons successively, the press is closed with a two-step operation, and upon operation of the second piston the press is closed with a one-step operation, and operator-operated means for locking the movable element from opening movement when the press is in preliminarily closed position.

4. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, two cylinders and pistons therein, and motion transmitting means individual to each piston between the pistons and the movable element, operator-operated means individual to each cylinder for controlling the flow of motive fluid to each cylinder independently, a fluid connection between the cylinders, and valve means in the connection permitting fluid flow from the second cylinder to the first cylinder only whereby upon operation of the pistons successively the press is closed with a two-step operation and upon the operation of the second piston the press is closed with a one-step operation.

5. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, a first cylinder having a piston therein, motion transmitting means between the "first piston and the movable element, a second cylinder having a piston therein, a toggle operatively connected with the movable element, means operatively connecting the second piston with the toggle so that a large extent of movement of the piston moves the toggle a relatively short distance during its final pressure movement, operator-operated means individual to each cylinder for controlling the flow of motive fluid to each cylinder independently, and means connecting the cylinders and permitting fluid flow from the second cylinder to the first cylinder only whereby upon operation of the pistons successively the press is closed with a two-step operation and upon the operation of the second piston the press is closed with a one-step operation.

6. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, a first cylinder having a piston therein, motion transmitting means between the first piston and the movable element, a second cylinder having a piston therein, a toggle operatively connected with the movable element, a pull link connected to one of the toggle links, cam means carried by the frame and pull link to guide the latter, the pull link being operatively connected with the second piston through the cam means to permit a large extent of movement of the toggle initially with a small extent of movement of the piston and a small final extent of movement of the toggle with a large final movement of the second piston, operator-operated means individual to each cylinder for controlling the flow of motive fluid to each cylinder independently, and means connecting the cylinders and permitting fluid flow from the second cylinder to the first cylinder only whereby upon operation of the pistons successively the press is closed with a two-step operation and upon the operation of the second piston the press is closed with a one-step operation.

'7. In a pressing machine, cooperating pressing elements one or" which is movable toward and from the other, motor means for actuating the movable element with a two step closing movement first into a position adjacent the other element and second into final pressing coaction therewith, an operator-operated member for controlling the first actuating step of the motor means, a second operator-operated means for controlling the second actuating step of the motor means and operable independently of the first control member, means operable at will for locking the first control member in its operated position, operator-operated releasable means operable automatically to lock the second control member in its operated position, and means to release the locking means.

8. In a pressing machine, cooperating pressing elements one of which is movable toward and from the other, motor means for actuating the movable element with a two step closing movement first into a position adjacent the other element and second into final pressing coaction therewith, an operator-operated member for controlling the first actuating step of the motor means, a second operator-operated means for controlling the second actuating step of the motor means operable independently of the first control member, and means operable at will for locking the press closed. in the first position before and after the second step.

'9. In a pressing machine, cooperating pressing elements, one of which is movable toward. and from the other, motor means for'actuating the movable element with a two step closing movement first into a preliminary closed position and second into final pressure position, operatoroperated means for controlling the two step operation, operator releasable means for locking the press in final closed position and in preliminary closed position during the closing movement of the press and. in the preliminary closed position upon release of the motor means from delivery of heavy pressure. 1:

' ERNEST DAVIS. 

